There is a country mile of ballistics between the 308 Win and the 338 Lapua. What do you want to do with it? 7mm's have a huge selection of good bullets and several good choices in cartridge case capacities to get it to do whatever you want to do. 6.5 has a few good choices. I like Lapua brass and tend to try to use their cases when I can. The 6mm is a sleeper with great choices of bullets. In 30 cal I really like the 300 RUM with heavy bullets but it ends up being up the scale towards the Lapua in performance than the ones listed.

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